Power tool turret cooling structure, tool turret and machine tool

Abstract

The invention discloses a power tool turret cooling structure, a tool turret and a machine tool, the power tool turret comprises a machine body, an input shaft, an output shaft and a cutterhead, a supporting shaft is arranged in the machine body, the cutterhead is provided with a cutterhead inner cavity, and a bevel gear seat is arranged in the cutterhead inner cavity; the cooling air path comprises an air inlet path and an air return path, the air inlet path comprises a supporting shaft air inlet hole and a bevel gear seat air inlet hole, the air inlet end of the bevel gear seat air inlet hole is connected with the air outlet end of the supporting shaft air inlet hole, and the air outlet end of the bevel gear seat air inlet hole is communicated with the inner cavity of the cutter head; the air inlet end of the bevel gear seat air return hole is communicated with the cutter head inner cavity, and the air outlet end of the bevel gear seat air return hole is connected with the air inlet end of the supporting shaft air return hole. According to the technical scheme, the interior of the tool turret is directly cooled in an air cooling mode, and compared with natural cooling, the tool turret can be cooled more efficiently, so that the rotating speed of a power tool of the tool turret is increased.

Description

Technical Field

[0001] This invention relates to the field of power turrets, and in particular to a power turret cooling structure, a turret, and a machine tool. Background Technology

[0002] The power turret is a crucial component of high-precision CNC machine tools, typically housing various cutting tools such as lathe, milling, and drilling tools. It facilitates rapid tool switching through rotation. When the powered tool rotates at high speed, the bearings supporting the spindle and the bevel gears transmitting power generate more heat. This temperature affects the lifespan and performance of the bevel gears and bearings in the turret's power unit. Natural cooling is inefficient, leading to rapid temperature rise and limiting the turret's rotational speed. Simultaneously, higher speeds also increase the temperature of the power tool motor, preventing prolonged operation. Improving external cooling efficiency requires additional cooling devices; however, the compact machine tool structure means that more external structures can interfere with the machining operation space, limiting the size of the workpiece to be processed.

[0003] In summary, the problems existing in the relevant technologies urgently need to be solved. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a power turret cooling structure, a turret, and a machine tool.

[0005] The technical solution adopted by this invention to solve its technical problem is: Firstly, a power turret cooling structure includes: A power turret includes a body, an input shaft, an output shaft, and a cutter head. The body contains a support shaft extending axially from a first end to a second end. The cutter head is rotatably mounted on the body and has an inner cavity. A bevel gear seat connected to the second end of the support shaft is located within the inner cavity. The support shaft has a hollow axial inner hole. The input shaft is mounted in the axial inner hole via bearings, and the output shaft is mounted in the bevel gear seat via bearings. The input shaft and output shaft are engaged by bevel gear transmission. The cooling air path includes an intake path and a return path. The intake path includes a support shaft intake hole disposed on the support shaft and a bevel gear seat intake hole disposed on the bevel gear seat. The support shaft intake hole extends from a first end to a second end of the support shaft. The intake end of the bevel gear seat intake hole is connected to the outlet end of the support shaft intake hole, and the outlet end of the bevel gear seat intake hole communicates with the inner cavity of the cutter head. The return path includes a support shaft return hole disposed on the support shaft and a bevel gear seat return hole disposed on the bevel gear seat. The support shaft return hole extends from a second end to a first end of the support shaft. The intake end of the bevel gear seat return hole communicates with the inner cavity of the cutter head, and the outlet end of the bevel gear seat return hole is connected to the intake end of the support shaft return hole. In conjunction with the first aspect, in some implementations of the first aspect, the machine body is provided with a connecting plate, the first end of the support shaft is mounted on the connecting plate, the air intake path includes a connecting plate air intake hole provided on the connecting plate, the air intake end of the connecting plate air intake hole is provided with a gas connector, and the air outlet end of the connecting plate air intake hole is connected to the air intake end of the support shaft air intake hole.

[0006] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the return air path includes a connecting plate return air hole disposed on the connecting plate, the air inlet end of the connecting plate return air hole is connected to the air outlet end of the support shaft return air hole, and the air outlet end of the connecting plate return air hole is provided with a silencer.

[0007] In combination with the first aspect and the above-described implementations, some implementations of the first aspect further include a power motor, which is disposed on the connecting plate, with its output end connected to the input shaft, and the muffler's exhaust direction facing the power motor.

[0008] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the first end of the support shaft is provided with a support sleeve, and is installed on the connecting plate through the support sleeve. The support sleeve is provided with a support sleeve air inlet hole that connects the air inlet hole of the connecting plate and the air inlet hole of the support shaft, and a support sleeve air return hole that connects the air return hole of the support shaft and the air return hole of the connecting plate.

[0009] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the air inlet of the support sleeve includes a first axial air hole that mates with the air inlet of the connecting plate and a first radial air hole that mates with the air inlet of the support shaft, and the air return hole of the support sleeve includes a second axial air hole that mates with the air return hole of the connecting plate and a second radial air hole that mates with the air return hole of the support shaft, wherein the first radial air hole and the second radial air hole form a transition groove extending a certain length in the circumferential direction on the inner circumferential surface of the support sleeve.

[0010] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the input shaft is supported at the first end of the support shaft by a first bearing and at the second end of the support shaft by a second bearing, and the air inlet and air outlet of the support shaft both flow through the mounting positions of the first bearing and the second bearing.

[0011] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the air outlet of the air inlet hole of the bevel gear seat and the air inlet of the air return hole of the bevel gear seat are located on different end faces of the bevel gear seat.

[0012] In a second aspect, a turret includes the power turret cooling structure described in any implementation of the first aspect.

[0013] Thirdly, a machine tool including a turret as described in any implementation of the second aspect. One of the above technical solutions has at least one of the following advantages or beneficial effects: The technical solution of the present invention directly cools the inside of the turret using an air-cooling method. Compared with natural cooling, this method can dissipate heat from the turret more efficiently, thereby increasing the turret's power tool speed, for example, to over 8000 rpm. This reduces the deformation of the turret dimensions caused by heat generation from internal bevel gears, bearings, and drive shafts, thus improving machining accuracy. The structure can be adapted to various turret sizes and does not occupy external machining space. The present invention has the following characteristics: 1. One structure can be used for multiple power turrets and adapts as needed: the size of the air vents is changed according to the size of the internal support shaft to cool the turret.

[0014] 2. High cooling efficiency: It can not only remove the heat generated by the bevel gears and bearings inside the turret through air cooling, but also cool the tool disc.

[0015] 3. Innovative structure, does not occupy machining space: The air-cooled structure is located inside the turret, without changing the turret structure. The appearance and installation dimensions are the same as the conventional model, without occupying external machining space, effectively reducing machine tool structural interference.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of cooling gas flowing along the air inlet of the support shaft according to an embodiment of the present invention; Figure 2This is a schematic diagram of the cooling gas flowing along the return air hole of the support shaft according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the outer structure of the connecting plate according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the flow of cooling gas along the air inlet of the connecting plate and the air inlet of the support sleeve according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the flow of cooling gas along the return air hole of the support sleeve and the return air hole of the connecting plate in one embodiment of the present invention; Figure 6 This is a schematic diagram of cooling gas flowing along the air inlet of the support sleeve according to an embodiment of the present invention; Figure 7 This is a schematic diagram of cooling gas flowing along the return air hole of the support sleeve according to an embodiment of the present invention; Figure 8 This is a schematic diagram of an embodiment of the present invention showing the cooling gas flowing from the outlet end of the inlet hole of the bevel gear seat to the inlet end of the return hole of the bevel gear seat. Figure 9 This is a schematic diagram of a embodiment of the present invention showing the cooling gas flowing from the inlet end of the return air hole of the bevel gear seat to the outlet end of the return air hole of the bevel gear seat. Detailed Implementation

[0018] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0019] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the purpose of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0020] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0022] See Figure 1 , Figure 2 An embodiment of the present invention provides a power turret cooling structure, including a power turret and a cooling air passage. The power turret includes a body 100, an input shaft 200, an output shaft 300, and a cutter head 400. A support shaft 500 is provided inside the body 100, extending axially from a first end 501 to a second end 502. The cutter head 400 is rotatably mounted on the body 100 and has a cutter head cavity 401. A bevel gear seat 600 connected to the second end 502 of the support shaft 500 is provided in the cutter head cavity 401. The support shaft 500 has a hollow axial inner hole. The input shaft 200 is mounted in the axial inner hole through a bearing, and the output shaft 300 is mounted in the bevel gear seat 600 through a bearing. The input shaft 200 and the output shaft 300 are driven by a bevel gear 700. The support shaft 500 supports the internal input shaft 200 and connects to the bevel gear seat 600. The bevel gear seat 600 connects the output shaft 300 and the support shaft 500. The cutter head 400 connects the internal and external output structures. The input shaft 200 can rotate under the drive of an external drive device. The output shaft 300 is connected to the input shaft 200 by a pair of bevel gears 700. The power cutter is connected to and driven by the output shaft 300. When the power cutter is running, the bevel gears 700 and the bearings of the input shaft 200 and the output shaft 300 will generate heat. The bevel gears 700 and the bearings are installed inside the support shaft 500 and the bevel gear seat 600, so the support shaft 500 and the bevel gear seat 600 need to be cooled.

[0023] See Figure 1 , Figure 2The cooling air path includes an intake path and a return path. The intake path includes a support shaft intake hole 503 disposed on the support shaft 500 and a bevel gear seat intake hole 601 disposed on the bevel gear seat 600. The support shaft intake hole 503 extends from the first end 501 of the support shaft 500 to the second end 502. The intake end of the bevel gear seat intake hole 601 is connected to the outlet end of the support shaft intake hole 503, and the outlet end of the bevel gear seat intake hole 601 is connected to the cutter head. The inner cavity 401 is connected, and the return air path includes a support shaft return air hole 504 provided on the support shaft 500 and a bevel gear seat return air hole 602 provided on the bevel gear seat 600. The support shaft return air hole 504 extends from the second end 502 of the support shaft 500 to the first end 501. The air inlet end of the bevel gear seat return air hole 602 is connected to the inner cavity 401 of the cutter head, and the air outlet end of the bevel gear seat return air hole 602 is connected to the air inlet end of the support shaft return air hole 504. See Figure 1 , Figure 2 Specifically, during operation, cooling gas is introduced into the turret and flows along the air inlet 503 of the support shaft. It then enters the air inlet 601 of the bevel gear seat from the air inlet 503. The cooling gas reaching the bevel gear seat 600 enters the inner cavity 401 of the cutter head from the outlet end of the air inlet 601. The inner cavity 401 of the cutter head is a relatively sealed space. The cooling gas further flows back from the return air hole 602 of the bevel gear seat and flows into the return air hole 504 of the support shaft. The technical solution of this invention uses air cooling to directly cool the inside of the turret. Compared to natural cooling, this method can dissipate heat from the turret more efficiently, thereby increasing the speed of the powered tool, for example, to over 8000 rpm. This reduces the deformation of the turret dimensions caused by heat generation in the internal bevel gear 700, bearings, and drive shaft, thus improving machining accuracy.

[0024] In some embodiments, see Figures 1-5 The body 100 is provided with a connecting plate 101. The first end 501 of the support shaft 500 is mounted on the connecting plate 101. The air intake path includes a connecting plate air intake hole 102 provided on the connecting plate 101. The air intake end of the connecting plate air intake hole 102 is provided with a gas connector 103. The air outlet end of the connecting plate air intake hole 102 is connected to the air intake end of the support shaft air intake hole 503. The air return path includes a connecting plate air return hole 104 provided on the connecting plate 101. The air inlet end of the connecting plate air return hole 104 is connected to the air outlet end of the support shaft air return hole 504. The air outlet end of the connecting plate air return hole 104 is provided with a silencer 105. The silencer 105 is used to reduce the sound when the cooling air is discharged.

[0025] Among them, see Figures 1-5It also includes a power motor 800, which is mounted on the connecting plate 101. The output end of the power motor 800 is connected to the input shaft 200, and the exhaust direction of the muffler 105 is towards the power motor 800. The power motor 800 also generates heat when it is running, and it also needs to be cooled. In this embodiment, the cooling air discharged from the muffler is sprayed onto the end face of the power motor 800 to cool it.

[0026] In some embodiments, see Figure 4 , Figure 5 The first end 501 of the support shaft 500 is provided with a support sleeve 900, which is used to install the support shaft onto the connecting plate 101. The support sleeve 900 has a support sleeve air inlet 901 that connects the air inlet 102 of the connecting plate and the air inlet 503 of the support shaft, and a support sleeve air return 902 that connects the air return 504 of the support shaft and the air return 104 of the connecting plate. By providing the support sleeve 900 that fits onto the first end 501 of the support shaft 500, the installation of the support shaft 500 within the machine body 100 is facilitated.

[0027] Further, see Figures 4-7 The support sleeve air inlet 901 includes a first axial air hole that mates with the connecting plate air inlet 102 and a first radial air hole that mates with the support shaft air inlet 503. The support sleeve air return hole 902 includes a second axial air hole that mates with the connecting plate air return hole 104 and a second radial air hole that mates with the support shaft air return hole 504. The first radial air hole and the second radial air hole form a transition groove 903 extending a certain length circumferentially on the inner circumferential surface of the support sleeve 900. By setting the support sleeve air inlet 901 and the support sleeve air return hole 902 as axial holes and radial holes, it is convenient to transition between the connecting plate air inlet 102 and the support shaft air inlet 503, and between the connecting plate air return hole 104 and the support shaft air return hole 504. At the same time, by setting the transition groove 903 extending a certain length circumferentially, the airflow between the support shaft 500 and the support sleeve 900 can be achieved within a certain angle range, reducing the assembly difficulty of the support shaft 500 on the support sleeve 900.

[0028] See Figure 1 , Figure 2 The input shaft 200 is supported at the first end 501 of the support shaft 500 via a first bearing 201 and at the second end 502 of the support shaft 500 via a second bearing 202. The air inlet 503 and air outlet 504 of the support shaft both flow through the mounting positions of the first bearing 201 and the second bearing 202. This effectively improves the cooling effect of the cooling airflow on the first and second bearings.

[0029] In some embodiments, see Figure 8 , Figure 9The outlet end of the bevel gear seat air inlet 601 and the inlet end of the bevel gear seat return air hole 602 are located on different end faces of the bevel gear seat 600. After the cooling gas flows out from the outlet end of the bevel gear seat air inlet 601, it bypasses the bevel gear seat 600 and finally flows back from the inlet end of the bevel gear seat return air hole 602. During this process, the cooling airflow flows in the inner cavity 401 of the cutter head, effectively improving the cooling effect on the cutter head 400 and the bevel gear seat 600.

[0030] Embodiments of the present invention also provide a turret, including the power turret cooling structure of any of the above embodiments.

[0031] The embodiments of the present invention, through innovative design, successfully improve heat dissipation, enabling the power tool of the turret to reach a higher speed and more stable machining accuracy. This structure is not only compact and located inside the turret, but also has the same external dimensions as a conventional turret, without occupying external machining space. This allows the turret to achieve a higher speed within the same size, improving machining performance, reducing machining time, and lowering machining costs.

[0032] Embodiments of the present invention also provide a machine tool including the turret of any of the above embodiments.

[0033] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A power turret cooling structure, characterized by, The application relates to a power cutter, which comprises a machine body, an input shaft, an output shaft and a cutter head. The machine body is provided with a connecting plate, the first end of the support shaft is mounted on the connecting plate, the air inlet channel of the connecting plate is provided with a gas joint, and the air outlet end of the air inlet channel of the connecting plate is connected with the air inlet end of the air inlet hole of the support shaft. The air return channel of the connecting plate is connected with the air outlet end of the air return hole of the support shaft, and the air outlet end of the air return channel of the connecting plate is provided with a silencer.

2. The power tool tower cooling structure of claim 1, wherein, The power motor is arranged on the connecting plate, the output end of the power motor is connected with the input shaft, and the air outlet direction of the silencer is towards the power motor.

3. The power tool tower cooling structure of claim 2, wherein, The first end of the support shaft is provided with a support sleeve, and the support sleeve is mounted on the connecting plate, the support sleeve is provided with a support sleeve air inlet hole which is connected with the air inlet hole of the connecting plate and the air inlet hole of the support shaft and a support sleeve air return hole which is connected with the air return hole of the support shaft and the air return hole of the connecting plate.

4. The power tool tower cooling structure of claim 3, wherein, The support sleeve air inlet hole comprises a first axial air hole which is connected with the air inlet hole of the connecting plate and a first radial air hole which is connected with the air inlet hole of the support shaft, the support sleeve air return hole comprises a second axial air hole which is connected with the air return hole of the connecting plate and a second radial air hole which is connected with the air return hole of the support shaft, and the first radial air hole and the second radial air hole form a transition groove which extends along the circumferential direction on the inner circumferential surface of the support sleeve.

5. The power tool tower cooling structure of claim 3, wherein, The input shaft is supported on the first end of the support shaft through a first bearing and on the second end of the support shaft through a second bearing, and the air inlet hole of the support shaft and the air return hole of the support shaft both pass through the mounting positions of the first bearing and the second bearing.

6. The power tool tower cooling structure of claim 5, wherein, ​ 7. The power tool tower cooling structure of claim 6, wherein, ​ 8. The power tool tower cooling structure of claim 1, wherein, The outlet end of the bevel gear housing air inlet hole and the inlet end of the bevel gear housing air return hole are located at different end faces of the bevel gear housing.

9. A tool holder characterized by, The power tool includes the power tool head cooling structure of any one of claims 1-8.

10. A machine tool, characterized by The tool head includes the tool head of claim 9.

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